381285180 has 144 divisors (see below), whose sum is σ = 1248234624. Its totient is φ = 93849600.

The previous prime is 381285169. The next prime is 381285187. The reversal of 381285180 is 81582183.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381285187) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161005 + ... + 163355.

It is an arithmetic number, because the mean of its divisors is an integer number (8668296).

Almost surely, 2^381285180 is an apocalyptic number.

381285180 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381285180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624117312).

381285180 is an abundant number, since it is smaller than the sum of its proper divisors (866949444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381285180 is a wasteful number, since it uses less digits than its factorization.

381285180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436 (or 2431 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 381285180 is about 19526.5250364728. The cubic root of 381285180 is about 725.1312833997.

The spelling of 381285180 in words is "three hundred eighty-one million, two hundred eighty-five thousand, one hundred eighty".